钛修饰纳米二氧化硅交联剂及胍胶压裂液研究  

The research of titanium-modified nano-silica crosslinking agent and guar gum fracturing fluid

作　　者：熊俊杰 赵林[1] 马超[1,3] 谢彬强[1] XIONG Jun-jie;ZHAO Lin;MA Chao;XIE Bin-qiang(Petroleum Engineering College,Yangtze University,Wuhan 430100,China;CNOOC EnerTech-Drilling &Production Co.,Tianjin 300452,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]长江大学石油工程学院,湖北武汉430100 [2]中海油能源发展股份有限公司工程技术分公司,天津300452 [3]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500

出　　处：《应用化工》2021年第10期2668-2671,共4页Applied Chemical Industry

基　　金：国家科技重大专项(2011ZX05017-002-HZ07);油气藏地质及开发工程重点实验室2019年开放基金课题(PLN201907)。

摘　　要：γ-氨丙基三甲氧基硅烷与硅酸钠水解制得表面修饰纳米二氧化硅,四氯化钛与表面修饰纳米二氧化硅反应,制得钛修饰纳米二氧化硅交联剂,粒径主要分布在6~11 nm之间,可有效降低羟丙基胍胶用量及残渣含量。配制了纳米二氧化硅交联剂交联的羟丙基胍胶压裂液,羟丙基胍胶浓度为0.35%~0.4%。室内研究表明,该压裂液体系各项性能良好,在170 s^(-1),150℃下,剪切120 min,粘度102 mPa·s;120℃下破胶60 min,破胶液粘度2.32 mPa·s;表面张力23.53 mN/m,界面张力0.91 mN/m;防膨率88.56%;残渣含量227 mg/L;岩心基质渗透率损害率为9.63%~15.77%,压裂液耐剪切性能、破胶性能、助排性能、储层保护性能等各项性能良好,满足压裂要求。Surface modified nano silica was prepared by(3-aminopropyl)trimethoxysilane and sodium silicate,then titanium tetrachloride reacted with surface modified nano silica to prepare titanium modified nano-silica crosslinking agent to decease amount of HPG and residue content of fracturing fluid effectively,the particle size of nano-silica crosslinking agent is between 6~11 nm mostly.Nano-silica crosslinking agent guar gum fracturing fluid is researched in laboratory,the concentration of guar is 0.35%~0.4%.The fracturing fluid has good performances,viscosity of fracturing fluid is 102 mPa·s at the condition of 150℃and shear rate 170 s^(-1),viscosity of breaking fluid is 2.32 mPa·s in 60 min breaking time at 120℃,surface tension is 23.53 mN/m,surface tension is 0.91 mN/m,anti-swelling rate is 88.56%,the residue content is 227 mg/L,the permeability damage rate of core is 9.63%~15.77%,the result show that the fracturing fluid have good performance including shear resistance,gel breaking,flow back,reservoir protection,et al,which satisfy the fracturing requirement.

关 键 词：交联剂 钛修饰纳米二氧化硅 胍胶压裂液 研究 

分 类 号：TQ11[化学工程—无机化工] TQ2